update readme

Author: Ihar Yakimush

README.md

@@ -102,8 +102,18 @@ IQueryable<Product> solrLinq = solr.AsQueryable(setup =>
   // cat:(qwe)
   Product[] result = solrLinq.Where(p => p.Categories.Any(s => s == "qwe")).ToArray();
   ```
-  ### Top, Skip
-  ### First(), FirstAsync(), FirstOrDefault(), FirstOrDefaultAsync()
-  ### Single(), SingleAsync(), SingleOrDefault(), SingleOrDefaultAsync()
+  ### Paging
+  - Top
+  - Skip
+  ### First
+  - First
+  - FirstAsync
+  - FirstOrDefault 
+  - FirstOrDefaultAsync
+  ### Single
+  - Single 
+  - SingleAsync
+  - SingleOrDefault
+  - SingleOrDefaultAsync
 ## Nuget
 https://www.nuget.org/packages/SolrNet.Linq